Re: [Beowulf] Problems with Dell M620 and CPU power throttling

2013-09-17 Thread Douglas O'Flaherty
I recently received a hallway tip from a performance engineer at a major SW company: "Run in C1. C0 over commits unpredictably, then throttles." He didn't specify a hardware platform. AFK: mobile On Sep 17, 2013, at 8:06 PM, Richard Hickey wrote: > Bill Wichser princeton.edu> writes:

Re: [Beowulf] Problems with Dell M620 and CPU power throttling

2013-09-17 Thread Bill Wichser
One week ago, on Tuesday September 10, we had a system downtime for some work on our central filesystem. During that outage we decided to not only power of the nodes but to also power off the chassis across 10 racks of these blades. Every day we check the systems by running a "stress" benchmark

Re: [Beowulf] Problems with Dell M620 and CPU power throttling

2013-09-17 Thread Richard Hickey
Bill Wichser princeton.edu> writes: > > Since January, when we installed an M620 Sandybridge cluster from Dell, > we have had issues with power and performance to compute nodes. Dell > apparently continues to look into the problem but the usual responses > have provided no solution. F